1. Post and core
some studies have indicated
that minimally damaged endodontically treated teeth
without posts are more resistant to fracture than teeth
restored with posts and cores

2. Definition
Dowel
a post, usually made of metal that is fitted •
into a prepared root canal of a tooth that •
has
had endodontic therapy •

3. Core
the coronal aspect of the post
foundation

4. Choice of Restorative Technique
for the Endodontically Treated tooth
Type of Tooth ( Anterior V.S. Posterior -1 •
2-amount of remaining coronal tooth
structure

5. Case evaluation
Endodontic Considerations •
Periodontal Considerations •
Prosthetic Considerations •

6. Endodontic Considerations
Good apical seal. 1 •
No sensitivity to pressure. 2 •
No exudate. 3 •
No fistula. 4 •
No apical sensitivity. 5 •
No active inflammation. 6 •
Retreatment should occur if there are signs . 7 •
or symptoms indicating failure •

7. Periodontal Considerations
Extensive coronal destruction may. 1 •
:require Crown Lengthening
a.to Re-establish biologic width •
b .to Provide coronal tooth structure to •
incorporate ferrule into cast restoration •

8. Ferrule effect 1.5-2mm of coronal
tooth structure to achieve
resistance form

10. Prosthetic Considerations
Extent of coronal destruction. 1 •
Other factors to evaluate. 2
(a. Tooth type (anterior vs. posterior
b. Position in arch
d. Occlusal and prosthetic forces applied to
Tooth

11. Factors affecting the retention
. of prefabricated post restorations
POST LENGTH •
POST DIAMETER •
POST DESIGN •
LUTING AGENTS •

12. POST LENGTH
The post should be longer than the. 1 •
.crown
The post should end halfway. 2 •
between the crestal
.bone and the root apex •
The post should be as long as. 3 •
possible without
disturbing the apical seal •

13. Optimal conservative post
placement, with appropriate
length, width and fit, for a
maxillary canine that
required a crown due to the
amount of lost tooth
structure

14. POST DIAMETER
Increasing the diameter of the post does •
not provide a significant increase in the •
retention of the post ; however, it can
;
increase the stiffness of the
post at the expense of the remaining •
dentin and the
.fracture resistance of the root •

15. Therefore post diameter must be controlled to preserve
,radicular dentin, reduce the potential for perforations
and permit the tooth to resist fracture

16. .
.Overly wide post and resultant root fracture

17. POST DESIGN
smooth •
Serrated •
threaded •

18. POST DESIGN
Prefabricated •
Custom made •

19. POST DESIGN
Tapered •
Parallel-sided.
•

20. LUTING AGENTS
Luting agents, including zinc phosphate, •
,polycarboxylate
glass ionomer •

21. PREPARATION OF THE CANAL
SPACE
AND TOOTH
gutta percha should be- 1 •
removed with an endodontic heat carrier •
until the
desired length is reached. A minimum of 4 •
to 5 mm of
gutta percha must remain to preserve the •
apical seal

22. root canal reamers can be-2
used to widen the canal space by a reaming action to
ensure a relatively round preparation

23. twist drills are-3
then used to shape the canal

24. Methods of placement of custom
made posts
Direct method •
Indirect method •

25. Custom Made Post: Direct Technique

26. Custom Made Posts: Indirect

27. Core material
Amalgam •
Composite •
Glass ionomer •